EP1634681A1 - Rasiersystem zum Ausführen mehrfacher Rasieraktionen - Google Patents

Rasiersystem zum Ausführen mehrfacher Rasieraktionen Download PDF

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Publication number
EP1634681A1
EP1634681A1 EP05023092A EP05023092A EP1634681A1 EP 1634681 A1 EP1634681 A1 EP 1634681A1 EP 05023092 A EP05023092 A EP 05023092A EP 05023092 A EP05023092 A EP 05023092A EP 1634681 A1 EP1634681 A1 EP 1634681A1
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EP
European Patent Office
Prior art keywords
shaving
blade
unit
razor
action
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05023092A
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English (en)
French (fr)
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EP1634681B1 (de
Inventor
Terence G. Royle
Robert White
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Gillette Co LLC
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Gillette Co LLC
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Filing date
Publication date
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Priority to DE60237120T priority Critical patent/DE60237120D1/de
Publication of EP1634681A1 publication Critical patent/EP1634681A1/de
Application granted granted Critical
Publication of EP1634681B1 publication Critical patent/EP1634681B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/042—Long hair cutters or older types comprising a cutting grid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/10—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/3846—Blades; Cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories

Definitions

  • the present invention relates to a shaving system in which more than one shaving action is performed during a shaving operation, to methods of shaving, and to blade unit sub-assemblies and cassettes for use in such apparatus and methods.
  • Shaving systems comprising multiple foil-type units are known, e.g. from US Patent No. 6,098,289 (Wetzel et al.) which also discloses combinations of short hair cutters with a long hair cutter.
  • Shaving systems comprising multiple razor-sharp blades are also known, e.g. from GB-A-1,460,732 which describes shaving cartridges comprising two parallel razor-sharp blades, and US Patent No. 5,661,907 (Apprille, Jr.) which discloses a shaving cartridge comprising three parallel razor-sharp blades.
  • a long hair trimming unit comprising a pair of interacting blades at the upper side of the shaver alongside a foil-type reciprocating shaving unit, e.g. JP-A-2000-288267 (Hitachi Maxell).
  • the scraper member tautens the skin and erects the hairs, but does not cut the hair, just before hairs are received within the slits of the electric razor cutter, for producing a closer shave when the electric shaver is used with a lubricating liquid for effecting a wet shave, as described at pages 13-15 therein.
  • a construction is used without a lather when operated in a dry shaver mode, it will disadvantageously increase skin irritation.
  • US 2001/0027608 A1 Barish
  • US 2001/ 0042308 A1 Barish
  • DE-A-34 28 631 A1 discloses an electric shaver having a single foil-type reciprocating shaving unit together with an auxiliary blade element (4) disposed laterally of the main shaving unit in a recess of the shaving head and which, subsequent to completing the electric shaving operation, can be pivoted from a rest position (Fig. 5) into an outwardly extending operating position (Fig. 6) for removing stray long hairs which may have been missed during operation of the foil-type cutter unit.
  • Combinations of hair manipulators and cutting members are also known, e.g. from WO-A-01/07212 and WO-A-01/07213 (Pragt).
  • GB-A-1,444,960 discloses a dry shaver having a cylindrically arcuate cutting surface defined by a plurality of cutting edges and means for rotationally reciprocating the cutter head about its longitudinal axis.
  • the reciprocating cutter head is positioned beneath a cylindrically curved outer cutting foil.
  • WO-A-98/07551 (Garenfeld et al.), which comprises a rotary clamping device for clamping hair and subsequently extracting it at least partially from the skin, whereupon the hair is severed adjacent the skin by a separate shaver or hair trimmer arrangement (13, 29), consisting of a static shaver blade (33) adjacent the skin and a shearing blade (31) which reciprocate in shearing relationship .
  • the appliance can be selectively set to a mode in which the oscillating shearing trimmer (13, 29) is decoupled from the drive, so that the appliance functions like a conventional epilator.
  • the dry shaving system has advantages which are not shared by the wet shaving system, and vice versa.
  • the dry shaving system is exceptionally convenient for the user, does not require the application of liquid to the face and is comfortable.
  • the wet shaving system normally requires the application of a lubricant, such as soap, and for some users tends to produce more discomfort than the dry shaving system. It does however on the whole produce a closer shave, for most users, than a dry shaving system.
  • a shaving apparatus comprising a drivable shaving unit having a skin-engaging cutter for performing a first shaving action on a user's skin; a motor adapted to drive said shaving unit to perform said first shaving action; and a blade having a guarded razor-sharp cutting edge positioned for hair-cutting shaving engagement with the user's skin, whereby said blade performs a second shaving action during use of said shaving unit to perform said first shaving action.
  • the razor-sharp cutting edge is of the type commonly referred to as a "wet” shaving blade, whereas the drivable shaving unit is of the type referred to as a “dry” shaver, whether of the "short hair cutting unit” or "long hair cutting unit” construction.
  • the blade is particularly preferred for the blade to be floatably mounted (i.e., spring mounted or biased on a resilient support). Moreover, it may be preferable to provide a second drivable shaving unit coupled to said motor and having a skin engaging cutter for performing a third shaving action on the user's skin, the blade being mounted between the first and second shaving units.
  • the first of the shaving units may be constructed as a short hair cutting unit and the second shaving unit may be constructed as a long hair cutting unit. In such a construction, the blade is expediently mounted on the long hair cutting unit.
  • both the first and second shaving units may be of the same type, for example both short hair cutting units.
  • a third drivable shaving unit may be coupled to the motor and constructed as a short hair cutter to perform a fourth shaving action, the second shaving unit being disposed between the first and third shaving units.
  • a second guarded razor-sharp blade may also be positioned for shaving engagement with the user's skin, so that the second blade can perform a fifth shaving action during use of the drivable shaving units to perform their own shaving actions.
  • the blades may preferably be mounted on respective opposite sides of the long hair cutter unit.
  • The, or each, blade may be guarded by a portion of the adjacent shaving unit, e.g. the side region of a foil-type cutter.
  • the or each blade may be mounted on a respective guard member.
  • the guard member may be constructed as a bar of plastic or metal generally parallel to the extent of the sharp blade, as is known from the "wet" shaving art.
  • the guard member may be provided by a plurality of fingers extending forwardly of the blade edge.
  • a guard wire may be provided along the distal ends of the fingers.
  • the or each shaving unit may comprise an inner cutter mounted for hair shearing engagement with the skin engaging outer cutter thereof and coupled to the motor to be driven thereby.
  • the or each inner cutter may be mounted for linear reciprocation.
  • the or each razor-sharp blade preferably has a straight edge mounted parallel to the direction of linear reciprocation.
  • shaving apparatus comprising a drivable shaving unit having an outer cutter for contact with the user's skin and an inner cutter mounted in hair shearing engagement with the outer cutter to provide a first shaving action; a motor adapted to drive said inner cutter to perform said first shaving action; and a razor-sharp blade having a cutting edge positioned for hair-cutting shaving engagement with said user's skin, whereby said blade performs a second shaving action during use of said drivable shaving unit to perform said first shaving action.
  • the blade is preferably floatably mounted.
  • a second drivable shaving unit is coupled to the motor and has an outer cutter for contact with a user's skin and an inner cutter mounted in hair shearing engagement with the outer cutter to provide a third shaving action, the blade being mounted between the first and second shaving units.
  • the first of the shaving units is preferably constructed as a short hair cutting unit and the second shaving unit is preferably constructed as a long hair cutting unit; alternatively, the first and second shaving units could be constructed to be the same.
  • the blade may be mounted on the long hair cutting unit.
  • a third drivable shaving unit coupled to the motor and constructed as a short hair cutter to perform a fourth shaving action, the second shaving unit being disposed between the first and third shaving units.
  • a second guarded razor-sharp blade may be positioned for engagement with the user's skin whereby the second blade can perform a fifth shaving action during use of the drivable shaving units to perform their respective shaving actions.
  • the blades are mounted on respective opposite sides of the long hair cutter unit.
  • the first and second razor-sharp blades face in opposite directions so that naturally the second and fifth shaving actions will not occur simultaneously.
  • the or each blade may be mounted on a guard member providing a plurality of fingers extending forwardly of the blade edge.
  • a guard wire may be mounted along the distal ends of the fingers.
  • the or each inner cutter is mounted for linear reciprocation.
  • shaving apparatus comprising: a shaver unit having a drivable skin-engaging cutter for performing a first shaving action on a user's skin; a motor adapted to drive the cutter to perform said first shaving action; and a guarded razor-sharp blade having a cutting edge positioned for hair-cutting engagement with the user's skin, whereby said blade performs a second shaving action during use of said shaving unit to perform said first shaving action.
  • the blade is preferably floatably mounted and may expediently be mounted on the cutting unit.
  • a second shaving unit is coupled to the motor and has a drivable skin-engaging cutter for performing a third shaving action on the user's skin, the blade being mounted between the first and second shaving units.
  • a third drivable shaving unit is coupled to the motor and disposed between the first and third shaving units to perform a fourth shaving action during use of the apparatus.
  • a second guarded razor-sharp blade is positioned to perform a fifth shaving action similar to the second shaving action during use of the shaving unit.
  • the blades are mounted on respective opposite sides of the third shaving unit.
  • the or each blade may be mounted on a guard member providing a plurality of fingers extending forwardly of the blade edge.
  • a guard wire may be mounted along the distal ends of the fingers.
  • a method of shaving comprising the steps of engaging the skin with the cutter of a drivable shaving unit; driving the shaving unit to perform a first, hair-shearing shaving action; and performing a second, hair-cutting shaving action with a razor-sharp cutting edge during said hair-shearing first shaving action .
  • the drivable shaving unit may comprise an outer cutter for contact with the user's skin and an inner cutter mounted in hair shearing engagement with the outer cutter in which case the motor will drive the inner cutter to perform the first shaving action.
  • the shaving unit will comprise a drivable skin-engaging cutter for performing the first shaving action on the user's skin, in which case the motor will drive the cutter to perform said first shaving action.
  • a blade unit sub-assembly that carries the razor-sharp blade edge or edges and that is mountable into a frame of a powered shaving head. This provides a replacement part so that the razor-sharp edges can be exchanged if they become dulled.
  • the sub-assembly has twin blade supports and twin sharp blade edges that face in opposite directions and can be mounted between dry-type shaving units, and in preferred embodiments is mounted for biased displacement.
  • the sub-assembly carries a spring-biased blade, and is preferably attached to an external surface of the shaving head.
  • FIG. 1 shows shaving apparatus having a housing 1 beneath which is mounted a motor and drive train shown generally at 2.
  • the housing 1 can be, for purposes of replacement, removable from the body housing within which the motor and transmission are mounted.
  • the active components of the shaving apparatus are a foil-type reciprocating shaving unit 3 and a blade-type shaving unit 4.
  • the foil-type reciprocating shaving unit 3 comprises a foil 5 and an undercutter 6.
  • the foil 5 is attached to the housing 1, e.g. by rivets, at attachment points 7 and 8.
  • the undercutter 6 is mounted on a block 9 which is coupled to the motor and drive train 2 and is biased into contact with the foil 5, in a substantially conventional manner by springs which are not shown.
  • the blade unit 4 comprises a blade carrier 10 and a blade element 11 providing a razor-sharp edge positioned close to the foil 5.
  • the razor-sharp edge is of the type commonly referred to as a "wet" razor blade which can cut or slice hair and can preferably cut or slice unsupported dry hair.
  • the carrier 10 is secured to the housing 1 by being clamped between the foil 5 and the interior surface of the housing 1. Region A of Fig. 1 is shown at an enlarged scale in Fig. 1 a.
  • the user shaves in the conventional manner by drawing the dry shaving unit 3 across the skin surface.
  • hairs are also engaged by the razor-sharp edge of the blade 11 so that a dual or hybrid shaving action results, the first action being of the dry shave type and the second action of the wet shave type, being performed together.
  • the blade unit 4 can perform either or both of two functions; firstly it performs a second cut on hairs already cut by the dry shaving unit 3 so that an even closer shave is produced; secondly it also acts to capture and cut any longer hairs which may be missed by the foil-type cutter.
  • conditioning can include hydrating, lubricating or any other means of preparing the skin and/or hair to be shaved, and may or may not include the use of water.
  • Lathering helps hydrate the hairs, and may also include agents such as soaps, gels, oils or emollients to reduce friction with the skin.
  • the dry shaving unit can be of the type disclosed in U.S. Pat. 6,098,289 (Wetzel), in particular having an outer apertured shaving foil and a reciprocating undercutter, which is hereby incorporated by reference.
  • the shaving unit could also be constructed as is known from U.S. Pat. 5,745,995 (Yamashita et al.) having one or more rotary cutters of the type marketed under the name Hitachi, which is likewise incorporated by reference.
  • the blade 11 is guarded, at least to some extent, by a portion of the surface of the foil 5 which thus assumes the function of what is commonly referred to - in the parlance of wet shaving - as the guard surface.
  • An imaginary plane P can be constructed tangential to the blade 11 and guard surface of foil 5 which generally lies along the skin surface being shaved by the both units. The dimensions and geometry are chosen so that this arrangement is sufficiently safe.
  • Figure 2 shows an arrangement which is similar to Figure 1 but with the further feature that the blade is provided with wire wrapping 12. This provides additional guarding for the razor-sharp edge and increases the level of safety for the user.
  • Patent document US-A-5 305 526 is representative of this feature and is hereby incorporated by reference.
  • FIG 3 shows an alternative method for improving safety and comfort.
  • the blade support member 10 extends beyond the sharpened edge of the blade 11 in the form of a plurality of fingers 13 or "safety skis",
  • Patent document WO 98/35795 is representative of this feature and is hereby incorporated by reference.
  • FIG. 5 which is otherwise similar to the embodiment of Figure 1, provides an etched and polished guard 15 as better shown in Figure 14. This acts as a skin protection device to prevent slicing.
  • FIG. 6 shows how two razor-sharp blades may be incorporated into a triple head shaver comprising three reciprocating foil-type shaving units 3a, 3b and 3c.
  • Units 3a and 3b are essentially the same as the shaving unit 3 shown in each of Figures 1 to 5 and are constructed for cutting short hairs.
  • Shaving unit 3c is however constructed and adapted specifically for shaving longer hairs. It comprises an outer skin-engaging cutter 5c and a reciprocating undercutter 6c. All three shaving units 3a, 3b and 3c are coupled to a common drive motor in the housing.
  • Short hair cutters and a long hair trimmer are disclosed in U.S. Pat. 6,098,289 (Wetzel) and U.S. Pat. 5,669,138 (Wetzel), each of which is hereby incorporated by reference.
  • each blade unit 4a and 4b are provided on opposite sides of the long hair cutting unit 3c. As illustrated, each blade unit is provided with safety skis and a guard wire and thus corresponds substantially to the construction shown in Figures 4, 12 and 13.
  • Figures 7, 8 and 9 show how the concept of the invention may be applied to foil-type shavers of the rotary type.
  • Figure 7 shows a single rotary shaving unit having a stationary outer cutter 5 beneath which a rotary undercutter is driven in continuous rotation by a motor within the housing. Surrounding the rotary shaving unit is provided an annular sharp-edged blade 11 facing inwardly towards the shaving unit.
  • Figure 8 shows a rotary shaving system corresponding to that shown in Figure 7 but here the annular sharp-edged blade faces outwardly from the rotary shaving unit.
  • a single rotary shaving unit is provided, corresponding to that shown in Figures 7 and 8. However, it is here surrounded by multiple sharp-edged inwardly facing annular blades 111.
  • Patent document U.S. 5,490,329 (Chylinski et al.) discloses similar annular blades, and is hereby incorporated by reference.
  • FIG 10 shows how the concept of the invention may be applied to a shaving system of a type having a rotary cylindrical cutter or rockable cylindrical cutter of the type disclosed, for example, in GB-A-1,533,679, GB-A-1,469,556 and GB-A-1,444,960, which are all incorporated by reference.
  • the shaving system comprises an outer foil 5 and an undercutter 17 comprising a plurality of longitudinally extending vanes or blades 18, which may be resiliently biased into contact with the foil 5 by respective springs (not shown).
  • the cutter is mounted for rocking motion about an axis 19.
  • the blade unit 4 is constructed essentially identically to that shown in Figure 4 and Figure 6.
  • the foil may be omitted if the cylindrical cutter is guarded appropriately as shown, for example, in Figure 11.
  • a part of the housing 1 is extended in an arcuate manner to form a guard 20.
  • Figure 15 shows a further embodiment of the invention in which a pair of razor-sharp blades are installed into a triple head dry shaving unit of the same general type as illustrated in Figure 6.
  • Figure 15 shows only the foil frame assembly consisting of three components; a foil frame 150, a centre long hair cutting unit 151 and a blade cassette unit 152.
  • the frame 150 and centre long hair cutter unit 151 are substantially conventional in construction.
  • the foil frame 150 carries a pair of foils 153, 154 which constitute respective outer cutters of a pair of short hair cutting units.
  • the long hair cutter unit 151 and blade cassette unit 152 are fitted into the slot-like aperture existing between the foils 153 and 154. Further detail of the blade cassette unit 152 may be taken from Figures 16 and 17.
  • FIG 16 shows an enlarged detail of the blade cassette unit having etched and polished guards 160 and 161 of the type illustrated in Figure 14.
  • the guards 160 and 161 are formed integrally with a pair of blade support members 162 and 163 respectively.
  • Each of the blade support members 162 and 163 carries a respective razor-sharp blade 164 and 165.
  • the sharpened edges of the blades 164 and 165 are directed outwardly in the direction of the respective short hair cutter units illustrated in Figure 15.
  • Figure 17 shows the same blade cassette unit with the blades removed to avoid obscuring the detail of the etched and polished guards 160 and 161.
  • the blade support members 162 and 163 can be connected together through a pair of webs 166 to form a subassembly, which facilitates the convenient assembly and replaceability of the razor-sharp blades as a unit when they become dulled through use.
  • a pair of webs 166 From each web 166, an elongate tang 167, 168 extends.
  • the tangs 167, 168 constitute springs which snap fit into slots on the foil frame to permit vertical displacement against a resilient bias.
  • Figure 18 shows a foil frame 180 carrying a pair of foils 181 and 182 to constitute the outer cutters of a pair of short hair cutter units. Between the foils 181 and 182 is located a long hair cutter unit 183 which carries on its outer cutter a pair of outwardly directed razor-sharp blades 184 and 185. The central long hair cutter unit, together with its razor-sharp blades 184 and 185, are better shown in Figure 19.
  • Figure 19 shows clearly how the blades 184 and 185 are mounted into a top angled recess on the upper surface of the central long hair cutter unit 183.
  • blades 194,195 could be mounted onto supports 191,192 that form side walls of the long hair trimmer unit, in a position analogous to that shown in Figure 15. As illustrated, the blades 194,195 are guarded using the safety ski system described in connection with Figures 12 and 13.
  • the long hair trimmer unit can be mounted to the shaving head frame by a laterally extending arm on each narrow end (seen at the ends of unit 151) that is received, such as with a snap-fit, in respective slots in the head frame either with clearance such that the long hair trimmer unit can displace vertically under spring bias, as in commercial models of electric "dry” shavers sold by the company Braun under the trade designation "Flex Integral”, or generally without much clearance so there is little, if any, vertical displacement, as in commercial models of electric "dry” shavers sold by the company Braun under the trade designation "Synchro".
  • the spring bias can be provided by the shaver's drive pin, which is received in the inverted "V"-shaped coupling block attached to the moving undercutter 6c, being mounted to a spring, as is generally known from U.S. Pat. 6,098,289 (Wetzel) as shown in Figures 3-3A thereof.
  • Figure 22 shows a foil frame with a pair of foils and a central long hair cutter unit according to a further embodiment of the invention.
  • the foil frame 200 carries first and second foils 201 and 202 between which is mounted a substantially conventional long hair cutter unit 203.
  • On each external side of the foil frame 200 is mounted a respective independently suspended razor-sharp blade 204 and 205.
  • the blade 204 together with its mounting arrangement, is better shown in Figure 23.
  • the blade 204 is mounted on an etched and polished blade support and guard arrangement of the type shown in Figure 14.
  • the blade support is secured to or formed integrally with a plate 206 which is slotted into a U-shaped frame 211 providing a pair of elongate guides 207 and 208.
  • the plate 206 is mounted on a single transverse leaf or wire spring 210 held by the frame 211.
  • the blade and its support are thus resiliently mounted to enable the blade and its support to retreat in response to forces applied by contact with a user's skin. This helps to maintain a relatively constant contact force between the blade and the user's skin.
  • the blade and mounting arrangement may be integral with, e.g. moulded integrally with, or attached to frame 200 e.g. by attachment structure such as a slot and pin arrangement, snap-fit pins or rivets, preferably such that the blade and mounting arrangement are removable and interchangeable when the blade's razor-sharp cutting edge becomes dulled.
  • a lubricant or other conditioner dispenser or lubricant strip may be provided to reduce friction between the razor-sharp blade or blades and the user's skin, and consequently improve shaving comfort.
  • a suitable strip can be mounted rearward of the sharp blade and includes polyethylene oxide (“polyox").
  • an essentially standard razor blade may be employed such as those marketed by Gillette under the trade designations Sensor and Sensor Excel or as disclosed in US-A-5,661,907 (Apprille, Jr.), which is incorporated by reference, or those used in the Gillette product marketed under the trade designation Mach3.
  • the sharpness of such blades is conventionally defined by the tip radius in a manner known to those skilled in the art.
  • the tip radius may typically be less than 0.5 microns, which would be a relatively blunt blade, and may lie in the range 0.5 microns to 50 nm (nanometers)(i.e., 0.05 microns), which would be relatively sharp.
  • the blade sharpness may lie anywhere between these extremes, depending on the cutting effect desired, as is well-known to those skilled in the art. It can even be advantageous to have a tip radius smaller than 0.05 microns, in some circumstances.
  • a particularly preferred blade is a Cr/Pt coated stainless steel blade with the tip profile defined by TABLE 1 below:
  • the sub-assembly comprising the frame or housing which supports both the razor-sharp blade or blades (and where applicable its or their blade mounting supports) together with at least an outer cutter of one of the dry-type shaving units (such as an outer foil, as shown in Figure 1), or an entire dry-type shaving unit (such as a long hair trimmer, as shown in Figure 15) can collectively define a replaceable part that is exchangeable when the sharp blades have become dulled.
  • the dry-type shaving units such as an outer foil, as shown in Figure 1
  • an entire dry-type shaving unit such as a long hair trimmer, as shown in Figure 15

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Cosmetics (AREA)
EP05023092A 2002-10-08 2002-10-08 Rasiersystem zum Ausführen mehrfacher Rasieraktionen Expired - Lifetime EP1634681B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60237120T DE60237120D1 (de) 2002-10-08 2002-10-08 Rasiersystem zum Ausführen mehrfacher Rasieraktionen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02022316A EP1410884B1 (de) 2002-10-08 2002-10-08 Rasiersystem zum Ausführen mehrfacher Rasieraktionen

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EP02022316A Division EP1410884B1 (de) 2002-10-08 2002-10-08 Rasiersystem zum Ausführen mehrfacher Rasieraktionen
EP02022316.0 Division 2002-10-08

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EP1634681A1 true EP1634681A1 (de) 2006-03-15
EP1634681B1 EP1634681B1 (de) 2010-07-21

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EP05023092A Expired - Lifetime EP1634681B1 (de) 2002-10-08 2002-10-08 Rasiersystem zum Ausführen mehrfacher Rasieraktionen
EP02022316A Expired - Lifetime EP1410884B1 (de) 2002-10-08 2002-10-08 Rasiersystem zum Ausführen mehrfacher Rasieraktionen

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US (1) US8109001B2 (de)
EP (2) EP1634681B1 (de)
JP (1) JP4790267B2 (de)
CN (1) CN100482427C (de)
AT (2) ATE474696T1 (de)
AU (1) AU2003275457A1 (de)
DE (2) DE60237120D1 (de)
RU (1) RU2324588C2 (de)
WO (1) WO2004033165A2 (de)

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RU2324588C2 (ru) 2008-05-20
WO2004033165A2 (en) 2004-04-22
JP2006501956A (ja) 2006-01-19
CN1703306A (zh) 2005-11-30
JP4790267B2 (ja) 2011-10-12
DE60209976T2 (de) 2006-09-14
AU2003275457A1 (en) 2004-05-04
ATE474696T1 (de) 2010-08-15
EP1410884B1 (de) 2006-03-22
CN100482427C (zh) 2009-04-29
EP1634681B1 (de) 2010-07-21
DE60209976D1 (de) 2006-05-11
US8109001B2 (en) 2012-02-07
DE60237120D1 (de) 2010-09-02
AU2003275457A8 (en) 2004-05-04
US20080216320A1 (en) 2008-09-11
EP1410884A1 (de) 2004-04-21
RU2005110192A (ru) 2006-05-10
WO2004033165A3 (en) 2004-09-02
ATE320886T1 (de) 2006-04-15

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